Sewing machine frame



Aug. 3, 1943. F. F. ZEIER 2,325,928

:SEWING MACHINE FRAME original Filed April 15, 1939 6 Sheets-Sheet 1 Fig fiederic Z'Zez'er Aug. 3, 1943. F. F. ZEIER 2,325,928

' SEWlNG MACHINE FRAME Original Filed April 15; 1939 6 Sheets-Sheet 2 Aug. 3, 1943.

v F. F. ZVEIER. -SEWING MACHINE FRAME Original Filed A ril 15, 1939 6 Sheets-Sheet 3 lhederick E2958,

Aug. 3, 1943. F. F. ZEIER SEWING MACHINE FRAME Original Filed April 15, 1959 6 Sheets-Sheet 4 'lllllll' 19 F m W 10. m d/ m m Aug. 3, 1943. F. F. ZElER 2,325,928

- ISEWING'MACHINE FRAME Original Filed April, 15, 1939 6 Sheets-Sheet 5 Aug. 3, 1943.

F. F. ZEIER I 2,325,928

SEWING MACHINE FRAME Original Filed April 15; 1939 2 e Sheets-Sheet e 2] Wm Frederifi 1 Zez'er t ese sk l eciin thezert.

' substent ellvselqii ite. 9 i t. i

Patented Au 3, 1943 uni s t appIicationiApriL "1 939;

Qt. P... -1!

, seem; Divide; and thisepnlication oetab ef tit I-$1-4 t.siaiiq-.362.9m..1;...

. invention relates to, sewing. mgchines. and more. particularly, to an immoved frame structure therefor. r

The primary oleiect of: the present-invention is the. provision of a maehineeframe skeleto-ni-Zed so. that all. the. mechanisms housed thereby-axe conveniently accessible; for assembly-' andwepeir by'simply removing. various.- plates andithe like. Another. object f'the. present invention sisthe provision of a. mechineetrame. having an. 'improved bect construction fitted with a removable work suppoiting plate: andi adapted to; b81128: ceived in a box-like dnip-pan, wherebyoil-drippings andiint. may. filten through the mecha-. I nisms in thebed. and. be collected in the'driprpen,

while theJvork-supporting. pletemay. b ir-e.mo.ved

to facilitate assembly,yadjustment and repair of the mechanisms, within the bed.

With the. abet/e. and othen objects. in view, as will hereinafter appear, the. invention comprises the devices, combinations, amrt'armngemerits of parts hereinafter set forth. and: illustrated in'the aeeompanyingl drawings oi apxrefexned embodie ment; of the invention; from which the several teatuxes; oi the. invention and the advantages iteinect t e eby be. ea i y.

Ee fimi e to. the tw sts;

the frame of a machine embodying the invention, how n 51 mQ QQ i l i fi F 2; wee? e ee. me hin wi h}. E q s'mkpag temov s. 3: ta the. e e th bxepke ret e. .i: t ?i?9 meted t ie eitem te @sm e h viihi e er e @110"? @12 2) E ite vi: 5 eeehiee-bee ith Fig. 4t is. 2. mag/end of the. mec

' cant-aistfibiititntys'tig iggeii tg' 1. tee-tin I e h efine te be eig x lhie s inn 'eshi e d fle t.

k-se ett ee gla 0 ei szseee t i ife 7". I Big. 1.1 15 transxerse tert eel understood: y-

e evetiee i he ewe 3 915 19. .95 '35. 3 9 99%.? r ism. removed toexpose heluleri- 6 r m de We. time. methiee;

te e ete e i ei'; r

. 0 weet ee ie geee onredheed shale,

pain taken subst antmilylalonga the line .ll'. '1.

v The roliowingie taiies. desctiption his. toes with theconstructionofi thejmachine-fmme only and feta more. complete des'e-nintionofitheentir machine. reference. meybehaditq my'U.S.1BQ.tent No.'2,265,140;' dated December. 3.6, 119.41. 015 which thiseipplicationisa division. Rei ning ino-re; in detail to...the drawings; the hollow, rnaichin'erf rame; whieh'i-s prefenably Cast v in twopieces, bed and arm, jcognpxisesa. teeters-,

gulais bed tifrombneendrofiwhiehnises'astatnd I ar,d.-2-.oi:.a.n..over1gangi 'bmeketeaxml'termi natingin.ahead-44.x 7 .5; The. rectangular bed t is comp-esed oi;- veztieally dirt: from the. mechanism within thesecomparte ments; Bytizefierenceoto. Fig- 71, it will; be'seen.

metal cover-plate I14.

. islthev standandpiioi. the; b racket-ja,xm .3. The

.15; sect zed; u on. the; ten o c1 ides the spate i -t tee tend ls or spleshe ebn etie t t tbe 2mQe. tm nt -.tt. ope kQQ-f standard is closed;- bye oi it. shee inea plate. I a; which is adantegi tbipreteetthe. operatox 7 from contesti g. he qti he be t. compartmen remov l. the. Diet:

1 $Y111Q.1 s

be t o sed: withrder te-f ee vthe. eleteltt be e its the gentti s endieqiee of he. qenneeiiens thatv compaiitment L30 fiomns thelowee portion or V sump of; a, lubricant chsmbenandi is closediatthe 7 bottom. by, meansof: a nemovable circular sheets Secured upon'the reainend-ep eirtion of' the befiiit,

standard'has ihtegreJI-iyiormed thenewith aver: i tical internal; partition t5. whichextends irom m/ m d Walkhofthebed: l to qgceveia plete ci tete e entered be the sn e iie stu '49;

tethe ee tt qe 5; ee wi h. e 7

The-.breeketymm atet-thesteneerd maids-mo: videdzawi hen internal 9313212 139111 2& and at; its heagieed; snmvided wean intemal. pext tiozg.

Z3; vzhieh partitions.definei zqomentmentthous= for actuating the needle and top feeding mechanisms. In addition, partitions 22 and 23 provide bearing lugs for the ball-bearing 24 and the bearing bushing 25 in which is journaled the main or arm-shaft 26. To lend support to the endportion of the arm-shaft 26 adjacent the standard 2, there is provided'an additional ball-bearing 21, and supporting means therefor which is mounted in the vertical internal partition of the standard 2.

the partition [5 by the set-screw 29 and having an axial bore 30, the diameter or which isslightly in excess of the diameter'of the arm-shaft 2B. The bushing 28 is formedrat one end with a re duced end-portion 3| uponsw'hich is press r fitted of the ball-bearing 33 is the flange of a beltsprocket 34 of which the hub 35 is secured by set-screw: 35 upon the arm-shaft 26." Fixed upon the end.of'the'armshaft 26 is the usual beltdriven balance-wheel 31. With the ball-bearing supporting means aboveedescribedgit will be obvious that the: bushing 28, ball-bearing. 33 and belt-sprocket maybe assembled asa unit and conveniently applied tothe machine byfmerely tightening" the set-screws-2 fi and 36. Further, from Fig. 1 it will beobserved. thatlthe flange of the belt-sprocket 34 is extended laterally'lsothat it encloses the ball-bearingv 33"and, in effect;

provides ahousing therefor. H

Longitudinal'ly. of'thef bed lnthereis journaled in the bushing 38;'-ball-bearing .39 and ball-bearing 40, the lower rotary main-shaft 4| having securedupon' one; end thereof a belt-sprocket 42 of the same diameter as the belt-sprocket 34,

These two belt-sprockets 34 and 42 are connected The supporting means for the ball-bearing '21 comprises a bushing 28 fixed in corners 49 of the cover-plate from their respective recesses and permitting the same to be tilted and removed; a l

The machine bed I is adapted to be placed in an open-topped box-like drip-pan 51 (see Fig. 8)

' having secured around its upper edge an L- sh aped'gasket 58 which prevents metal-to-metal contact between the machine-bed I and the drippan 51. It will be understood that the surplus oil supplied to the various bearings through piping laterto be described, is collected in the drippanl which periodically is drained through the the inner race 32 of a commercial'ball-bearing 33. 1 T Press-fitted upon the periphery of the outer race plug 59 arid cleaned out. The gasket 53 not only prevents the egress of oil from the drip-pan 51,

. but also functions as 'a vibration dampening by means of a conventional"clip-belt.43 to rotate at a ratio of one-to-one'.- Itwillbe seen from Fig..l' that the belt-sprocket '42, as in the case of belt-sprocketil, in'effectacts as a support for the endof the lower main-shaft 4| through the medium of theball-be'aringand thestationary' bushing '44 secured in thewall 8 of the bed I.

The main-shaft 4| at itsforward end-portion has secured thereto eccentrics andfa crank foractuating the mechanism located withinithe bed I. 1 Referring now to Figs. 7 to 10, inclusive, it will be observed that the bed I is provided with a work-supportingplate 45 detachably secured by I means of four screws 46. In order that access may be had to the mechanism beneath the worksupporting.plateAEgZand tosfaciiitate threading the looper,vthe work suppor'ting plate 45-isrfitted with a removable cover-plate 41 held in position by the latch 48, the upper surface of the coverplate being at the same level as the upper surface of the work-supporting plate. Thislatch I 48 yieldingly maintains the two corners 49 of the cover-plate 41 seated in'undercut recesses formed in the work-supporting plate .45. The latch 48 is maintained in engagement with the coverplate 41 by a bowed spring 50 the ends of'which bear against a retaining strap 5| fastened beheath the work-supporting plate'45 by the screws 52. -Endw i s e movement of the latch 48' is controlled by the stop-pin 53 of which the head enters an enlarged aperture54'in the latch 48. Chatter of the cover-plate 41 is minimized in the'present case by using only three point contact between the cover-plate :41 and the work-sup .porting plate i5; aided by 'theuse (of a strip of i rubber or felt 55- on'the' latch 48. To facilitate removal of the cover-plate- 41,"the 'latter:.is

expedient.

. -Referring to Fig; 1, the standard 2 is divided threaded into the wall moi the bed. Contacting the oil contained in the compartment [3 is an oil-sling in theform of airing 6| running on a grooved driving collar 62 secured upon the lower main-shaft 4|. lThisI'oil-sling during the opera tion of. the machine creates an oil-mist through- Y out :ithe entire compartment [3 of the machine and the oil suspended in this atmosphere is deposited upon an. inclined collector plate 63 at the top of thecompartment [3. The oil upon the collector plate 63 .runs off the same into an open-toppedreservoir 64 at the upper end of the compartment '13. The oilcollected in the reservoir 64 is distributed to the needle-bar mechanism and other bearing points within the bracket-"arm requiring lubrication through the lubricant-conduitBS. I

Adjacent the lower end of the lubricationcompartmena'the 'oil suspended in'the"atmosphere is collected in two tubular reservoirs 66 and 61 which are c'onnected through suitable piping (see-Figs}. 5 and 6) to all the points requiring oiling. V

From the above description, it will beunden 'stoodthat amachine-frame is provided in which all the mechanism'housed thereby i conveniently accessible for assembly and repair, by virtue of the lfactthat-the 'machine f-rame is skeletonized and is'nt'ted with removable 'c'over' plates and a removable box-like drip-pan. This construction of the machine-framelis particularly advantageous in assembling and adjusting the machine, since it exposes the majorityo'f the mechanisms within the machine-frame; v Having thus set forththej nature of the invention,whatIcl'aim herein is: j 1" 1. Ajsewing machine frame omprising a bed having .side and end walls and a plurality of transversely arranged dividing partitions defin-fi ing a mechanism compartment and "an oil-sump compartment; 'a' bracket arm terminating in a I head overhanging 'said;bed;fa-drip-pan having upstandingsideland end walls adapted to-receive said bed;-and a detachable work-supporting'plate secured upon the top of said bed for covering the operating connections contained within the mechanism compartment of said bed.

2. A sewing machine having a hollow frame including a bed having side and end walls and a bottom wall at one end only; a standardand a bracket-arm; said bed having a plurality of transverse partitions dividing said bed into at least one mechanism compartment and an oil-sump; a vertical partition in said standard in alinement with one wall of said oil-sump and extending to the top of the bracket-arm dividing said stand- 4 ard into a splash-lubrication compartment and a belt compartment; an open-topped box-like drippan adapted to receive said bed and providing a bottom wall for said mechanism compartment in said bed; and a removable work-support mounted upon said bed and providing a top for said mechanism compartment in said bed.

3. A sewing machine having a hollow frame in cluding a bed having side and end walls and a bottom wall at one end only, a standard and a bracket-arm terminating in a head, said bed having at least one transverse partition dividing said bed into a mechanism compartment and an oilsump; a vertical partition in said standard in alinement with one wall of said oil-sump and extending to the top of the bracket-arm dividing said standard into a splash-lubrication compartment and a belt compartment; a plurality of internal partitions in said bracket-arm defining between the head thereof and the splash-lubrication compartment a mechanism compartment; an

open-topped box-like drip-pan adapted to receive said bed and provide'a bottom wall for said mechanism compartment in said bed; a gasket interposed between the top of said drip-pan and the side and end walls of said bed to prevent metalits upper surface substantially at the same level as the upper surface of the work-supporting plate; and resilient means for locking said coverplate in position upon said work-supporting plate. 5. A sewing machine frame comprising a bed having side and end walls and a plurality of trans- I versely arranged dividing partitions defining a mechanism compartment, and an oil-sump; a

standard rising from one end of said bed; a

bracket-arm terminatingin a head overhanging said bed; a drip-pan having upstanding side and end walls adapted to enclose the side and end walls of said bed; a Work-supporting plate secured a upon the top of said bed and having formed to-metal contact between the drip-pan and bed;

of said bed; a work-supporting plate secured upon the top of said bed and having formed therein an opening through which access may be had to the mechanism compartment in said bed; a removable cover-plate for closing said opening having therein an opening through which access may behad to the mechanism compartment in said bed;

a removable cover-plate for closing said opening having its upper surface substantially at the same level as the upper surface of the work-supporting plate; and resilient' means forlocking said coverplate in position upon said work-supporting plate, said resilient means comprising a latch supported by, said work-supporting plate and biased into engagement with said cover-plate by a spring acting between the latch and the worksupporting plate.

6. A sewing machine frameas set forth in claim a, in which the resilient means for locking said cover-plate inposition upon said work-supporting plate comprisesa latch slidably attached. a

to the Work-supporting plate by a retaining strap,

and a bowed spring acting between the latch and a r the retaining strap for yieldingly biasing said latch into engagement with said work-supporting plate.

i 7. A sewing machine frame comprising a bed having side and end walls and a plurality of transversely arranged dividing partitions substan'-' tially the same height as said side and end walls and defining at least one small mechanism compartment and an oilsump; the'latter of whichi's closed at its bottom; a standard terminating into a bracket-arm secured on said bed a vertical.

partition in said standard in alinement with one .wall of said oil-sump and extending to the top of the bracket-arm dividing said standard into a splash-lubrication compartment and a belt-compartment; a cloth-plate secured on said bed to provide a fiat work-supporting surface; and a high-walled open-topped box-like adjacentthe level of said cloth-plate, said drippan providing a bottom wall for said mechanism compartment in said bed.

drip-pan adapted to receive said bed and contact the same FREDERICKF. ZEIER." 1 

